Chowchilla is a city in Madera County, California. Take a look below for 10 amazing and fun facts about Chowchilla, California, United States. 1. The city’s population was 18,720 at the 2010 United States Census, up from 11,127 at the 2000 U.S. Census. 2. Chowchilla is located 15 miles (24 km) northwest of Madera, at…